Re: [RFC/PATCH] cpuset: cpuset irq affinities

Max Krasnyanskiy
2008-03-04T19:53:09Z

Peter Zijlstra wrote:
> On Tue, 2008-03-04 at 01:35 -0600, Paul Jackson wrote:
>> Peter wrote:
>>> OK, understood, I'll try and come up with yet another scheme :-)
>> Would your per-cpuset 'irqs' file work if, unlike pids in the 'tasks' file,
>> we allowed the same irq to be listed in multiple 'irqs' files?
>
> I did think of that, but that seems rather awkward. For one, how would
> you remove an irq from a cpuset?
>
> Secondly, the beauty of the current solution is that we use
> irq_desc->cs->cpus_allowed, if it were in multiple sets, we'd have to
> iterate a list, and cpus_or() the bunch.
>
Yeah, that would definitely be awkward.

Max